<!DOCTYPE html>
<html lang="en" dir="ltr">

<head>
  <meta charset="utf-8">
  <title></title>
  <!--引入three.js三维引擎-->
  <script src="http://www.yanhuangxueyuan.com/versions/threejsR92/build/three.js"></script>
</head>

<body>
  <script>
    var PointLight = new THREE.PointLight()
    // 点光源PointLight属性isPointLight默认值true
    console.log(PointLight.isPointLight);
    // 点光源PointLight继承基类Light的isLight属性
    console.log(PointLight.isLight);
  </script>

</body>

</html>
